Adjustable headband



FIG. 1 is a perspective view of an adjustable headband in accordance with the present design;

FIG. 2 is a right view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a bottom view thereof, showing by dashed line a portion 5;

FIG. 5 is a portion of the bottom view thereof from FIG. 4;

FIG. 6 is a top view thereof;

FIG. 7 is a front view thereof, showing by dashed line a portion 8;

FIG. 8 is a portion of the front view thereof from FIG. 7;

FIG. 9 is a back view thereof; and,

FIG. 10 is a front view thereof showing the adjustable headband in a different position.

The broken line showings of the adjustable headband are included for the purpose of illustrating portions of the crystal award and form no part of the claimed design. 

CLAIM I claim the ornamental design for a adjustable headband, as shown and described. 